Merge pull request #203 from copitux/patch-1

Send 'Content-Length' header at callback request (Community contrib)

Author: Marcos Reyes

lib/evCallback.js

@@ -89,8 +89,12 @@ function doHttpCallback(task, respObj, callbackHost, cbField, callback) {
   var traceID = task.traceID;
 
   if (callbackHost) {
+    var strRespObj = JSON.stringify(respObj);
     var callbackOptions = url.parse(callbackHost);
     callbackOptions.method = 'POST';
+    callbackOptions.headers = {
+      'Content-Length': Buffer.byteLength(strRespObj)
+    }
     var callbackReq = http.request(callbackOptions, function(callbackRes) {
       //check callbackRes status (modify state) Not interested in body
       cbRes[cbField + '_status'] = callbackRes.statusCode;
@@ -139,7 +143,6 @@ function doHttpCallback(task, respObj, callbackHost, cbField, callback) {
         }
       }
     });
-    var strRespObj = JSON.stringify(respObj);
     callbackReq.write(strRespObj);
     callbackReq.end();
   } else {